Influence of carbonates on the surface charge of a natural solid

被引：12

作者：

Davranche, M ^{[1
]}

Beaufreton, S ^{[1
]}

Bollinger, JC ^{[1
]}

机构：

[1] Univ Limoges, Fac Sci, Lab Sci Eau & Environm, F-87060 Limoges, France

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2002年 / 249卷 / 01期

关键词：

carbonate; calcite; natural solid; pK(a); pH(znpc); surface charge; potentiometric titrations;

D O I：

10.1006/jcis.2002.8249

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Carbonates are the predominating species in natural chemical processes. Thus, understanding the reactions that occur on their surfaces is very important. The aim of this study was to determine the influence of carbonates on the surface charge of a natural soil sample. First, surface properties of a synthesized calcite were determined using a simplified surface speciation model correlated to potentiometric titrations, and then intrinsic acidity constants and pH(znpc) (pH where protonic surface charge is equal to 0) were studied for solids with different percentages of calcite. A strong influence on surface properties of the solids was evidenced even for small additional quantities of calcite. (C) 2002 Elsevier Science (USA).

引用

页码：113 / 118

页数：6

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